Hi Ariel,

Your program looks okay to me (although I am not familiar with the
internal oscillator). So most likely the issue is in the hardware or
the oscillator.
Can you blink a led with this pic. In other words: are you sure the
pic running and approximately at the right speed?

> Obviusly, the LCD module are conected like the source code.
This is not as obvious unless you checked this. I usually do this by
giving a subsquent high puls on each of the 6 pins used, followed by
an extra delay to mark the start of the sequence. Make sure the proper
signal is at each pin of the lcd. Lines may be crossed, not connected
or shorted. Use a slow pulse (0.5 sec or so) when you use two leds to
verify (you need two to check if sequence is okay) or fast when you
have access to a dual trace scope.

Joep

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